51978530798 has 8 divisors (see below), whose sum is σ = 78141445200. Its totient is φ = 25931382400.

The previous prime is 51978530777. The next prime is 51978530803. The reversal of 51978530798 is 89703587915.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51978530798.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28940378 + ... + 28942173.

It is an arithmetic number, because the mean of its divisors is an integer number (9767680650).

Almost surely, 2^51978530798 is an apocalyptic number.

51978530798 is a deficient number, since it is larger than the sum of its proper divisors (26162914402).

51978530798 is a wasteful number, since it uses less digits than its factorization.

51978530798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57883002.

The product of its (nonzero) digits is 19051200, while the sum is 62.

The spelling of 51978530798 in words is "fifty-one billion, nine hundred seventy-eight million, five hundred thirty thousand, seven hundred ninety-eight".